164 PLATE LXIII. 



Fig. 9. A specimen from Strangford Lough, Ireland, 

 sent to me by Prof. Dickie. Natural size. 



Fig. 10. A full-sized skeleton spiculum. X 250 

 linear. 



Fig. 11. A tension spiculum from the dermal 

 membrane. X 250 linear. 



Fig. 12. One of the contort, bihamate, retentive 

 spicula from the dermal membrane. X 530 linear. 



Fig. 13. A reversed, bihamate, retentive spiculum 

 from the dermal membrane, X 530 linear. 



Fig. 14. -A dentato-palmate, inequi-anchorate, re- 

 tentive spiculum from the dermal membrane. X 530 

 linear. 



In vol. i, Plate XIII, figure 264, there is a fibre of the 

 skeleton of this species represented. X 108 linear. 



